“universal staple removal”
“universal” - because they fit in every deck and counter almost every threat.
“staple removal” - because the other removal options available aren’t as good regardless of color (so imbalanced)
IMO a card that is universally available, like the neutral cards should have limited utility…like punishment, where it’s fine and might work in the right deck to fit in a limitation imposed by the deck’s color - or cards like yak attack that have niche uses. Each color has had staples (like Aurora/frogify in blue, seifer’s wrath in red, etc). Those are strong cards that help define each color and will most likely be in decks of those colors. That’s unavoidable…but you shouldn’t have neutral staples - because then you’re reducing deck variety by three cards in every deck. The game becomes less about which deck you picked and more about who drew their flowers first.
It won’t necessarily lead to an imbalanced meta in the end, since everyone can use crystal flower. What it will do is get rid of variety in removal since there is almost no reason to run last nightmare anymore (for example). So the end result is a much more stale meta, where three cards of every deck are crystal.